Arturo, often called "the world's saddest polar bear", has passed away after being trapped inside an unbearable Argentinian zoo for 22 years.

According to reports, the 30-year-old animal died at Mendoza Zoological Park on Sunday due to unknown circumstances… but surely the 100+°F South American heat didn't help the creature naturally found in the North Pole.

Arturo had been the subject of numerous petitions from animal rights activists — including public protest from Cher herself — but sadly, the zoo never seemed to care about his well-being.

In fact, Assiniboine Park Zoo in Canada tried to take the creature away from his captors, but Mendoza lacked even the basic medical information necessary to guarantee safe transport.

To give you an image of what he endured, the wild animal's enclosure only featured a 20-inch pool and solid concrete slabs… but things took an even more depressing turn in 2012 when Arturo's cellmate Pelusa died from cancer.

But now, the younger sister of Louis, Félicité Deakin (pictured above, left, with Louis), has figured out her own way to pay tribute to her mother in a very special manner, and we are SO touched by it.

On Friday, the 16-year-old Deakin shared the following image (below), a gorgeous portrait of the family with her late mother, Johannah Deakin, surrounded by all of her children: